Automatic stoker.



No. 880,622. PATENTED MAR. 3,` 1908. M. BREWSTER.

AUTOMATIC STOKER.

APPLICATION FILED JAN. 25. 1907.

3 SHEETS-SHEET l.

' ATTORNEY.

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No. 880,622. PATENTED MAR. 3, 1908.

M. B. BREWSTER.

AUTOMATIC STOKER.

APPLIOATION FILED JAN. 25, 1907.

s SHEETS-SHEET s.

I/V/TNESSES: NVENTOR.

MORRIS B. BREWSTER, OF COLUMBUSQOHIO.

AUTOMATIC STOER.

Specification ,of LettersPatent. l

Patented March 3, 1908.

Application filed January 25. 1907. Serial No. 353.938-

To all whom it may concern:

. Be it known that I, MORRIS B. BREWSTER, a citizen of the United States, residing at Columbus, i-n the county of Franklin and v State of Ohio', have invented certain new and useful Improvements in Automatic Stokers,v

of which the following is a specification.

My invention relates to new and useful improvements in automatic stokers.

The objectv of the invention is to provide an over head fed Stoker which while comprising means for controlling the delivery of the coal, obviates the necessity of expensive and complicated machinery or valves of the shearing type.

A further feature resides in a universal connection in the feeding mechanism which permits the parts to bepositively connected irrespective .of the relative positions of the locomotive and tender.

Among other provisions are self closing valves, a common operating shaft and a particular form of distributingtable.

Finally the object of theinvention is to provide a device of the character described that will be strong, durable, efficient and simple and inexpensive to manufacture.

Also one in whichthe several parts will not be liable to get out of working order.

With the above` and other objects in view, the invention consists of the novel details f construction and operation, a preferable embodiment of which is described in the speciication and illustrated in the accompany` in drawings, wherein: igure 1 is a front elevation of my stoker and a portion of the rear end of a locomotive boiler, Fig. 2 is a longitudinal sectional view taken on the line :1cof Fig. 1, Fig. 3 is a plan view of the distributing table and the nozzles, Fig. 4 is a plan view of the socket.

casting and the piston valve, and Fig. 5 is a vertical sectional view of the piston valve In the drawings the numeral l, designates the combustion chamber of a locomotive and 2, the rear boiler sheets, 3, the ordinary firedoor frame and 4, the combustion chamber opening, while at 5 a portion of the cab roof is shown. l

Above the fire-door frame 3, a casting 6 is bolted to the boiler sheets. This casting comprises a forwardlyextending web 7 which terminates in a socket or bowl Slopen at its bottom and having downwardly extending front and rear plates 9. Between these plates hollow valves 10 of the V-shape-typel shown in Fig. 1.

are mounted to swing to each side on rods 11 passing through the plates. It is to be understood that coal passes through the bowl 8, the valves acting as cut-ofi1 so that the passage of the coal may be regulated and controlled. The valves are so hung 'and weighted as to swing into contact beneath the center of the bowl, thus being self closing. Suitable means may be arranged to limit this swinging movement. v

The plates terminate a short distance below the valves and register, but do not contact, with an elbow 4hopper 12 forming part of a fire-door 14 and having communication with the combustion chamber through the frame 3-and the opening 4. The re-dooris shaped and proportioned so as to be substi tuted for the usual fire-door without altering any of the standard parts and thus may be swung open to permit firing in the usual way.

4As in my Stoker 'and conveyer patented i tomary to use a wide mouth hopper on ac-i count of the lateral swinging of the conveyer casing when the locomotive and tender are taking curves and the swaying due to fast' running. Even with the wide mouth hopper Nwhich consumes. considerable room in the cab, the coal is often thrown past .the sides of the hopper and to overcome this obectionable feature I have devised the fol owing construction.-v

Within the howl 8 an open ended ball 17 is mounted t0 freely turn'so that a ball and socket joint is provided. At its upper end the4 ball is formed with a collar 18, which snugly receives an upwardly extendingpipe 19, Nthe latter losely receiving a s out 20, which telescopesinto the'pipe. Alliook 21 secured tothe spout engages a link 22 fitting about the bearing 16a of the conveyer 16 as It is evident that is the conve er cas' swin s, the s out an pipe also sswing, fhg hookg and lilik effecting a positive connection, so that the conveying of the coal is continuous and the liability of lumps' ofycoal being thrown about the cab conveyer through the spout 20, ipe 19, ball and socket joint, valves 10 and opper 12 to the fire opening 4. Within the combustion chamber 1 and at the bottom of the fire opening, 'a distributing table or shelf 23 is secured to ythe inner sheet 2 by a downrwardly inclined flange 24. The table is most nozzles being directed toward the sides of the combustion chamber, while the inner nozzles 26 are directed diagonally toward-the forward corners of the said' chamber. The

l nozzles 27 terminate in the fire opening 4, in

line, so that the fluid is ejected against the sides of the ridge 25. The coal passing through the opening 4 is delivered onto the table 23 about and over the nozzles, thus when the fluid is l emitted from the nozzles, it distributes or discharges the coal from the table to the different parts of the combustion chamber toward which the nozzles are directed. The fluid from the nozzles 27 forces the coal against the ridge 25, which owing'to its forwardly inclined and flaring nature, scatters the coal well forward, but prevents any quantity banking in. one

place, an even distribution thus being obtained. Suitable the nozzles ma bemade.

The means or supplying and controlling the supply of fluid to the ipes comprises a manifold 29 connected with the pi es 28, in which lattervalves-30 are arranged) over the said manifold. The amount of fluid passing through each ipe may thus be controlled. The manifold as connection through a p' 31, with a valve cylinder 32 web 7 of the casting 6. Fluid under pressure is supplied tothe cylinder by a pipe 33. The

provision for adjusting pipes 31 and 33 communicate with the cylj lnder through ports 34 and 35 respectively,

so that the fluid may sass into the c linder through the port 35 an out through t 1e port 34, the ports being in close proximity. A piston valve having separated heads 36 and 37 is mounted to move vertically in the cylinder andy provided with an upwardly eX- tending piston rod 38. This rod has pivotal connection with an odset rod 39, the latter having rigid connection with the ring 40 of an eccentric 41 mounted on a shaft 42 supported in bearings 43 secured to the roof 5 of the locomotive cab. By'means of this construction the heads are reciprocated in the cylinder, so that when the eccentric 4l is at pe mounted on t e the greatest or lowest point of its throw, the

valve will be at its lowest point, the head 36 eccentric is limited so as not to carry the head 36 over stroke.

It' is evident that some means for opening the valves 10 must be rovided and for this purpose I mounton t e shaft 42 a second eccentric 45 having a ring 46. This eccentric is set opposite to the eccentric 41 with relation to the revolution of the shaft. A cross-bar 47 is carried by the ring and eX- tends transversely of the shaft. Chains 48 are suitably secured on the ends of the cross-bar and at their lower ends have connection withv ears 49 formed on the outer ends of the valves 10. the lowest point of its throw, the valves areA closed as shown in Fig. 1. The valves are the port 35 on the upward When the eccentric is at` opened or swung outward by the chains as the coal to pass between the plates 9 to the hopper 12. As before stated the valves are weighted and so hung as to be self closing, so that after the eccentric swings over its center, the cross-bar is lowered and the valves permitted to swing together again interrupting the passage of the coal.

AIt will be observed that by arranging the eccentrics opposite or at halves, the valves 10 are opened and coal allowed to pass to and accumulate in the fire-opening 4 and upon the table 23, so that the valves are closed when the head 36 uncovers the port 34 and permits the fluid toA pass to the nozzles and distribute the charge of fuel in the combustion chamber. It will further be noted that no valve closing gearing or cylinders or other'- complicated mechamsm is mounted about the fire-door or on the boiler sheets and also access may be had to any of the parts. j

The shaft 42 has connection through a universal coupling 50 with a power shaft 51 drivenfrom and carried by'thetender. By provision of the coupling, the shaft may be readily disconnected when the locomotive and tender are uncoupled. The couplingl of the locomotive and tender incidental to taking curves 'and uneven track etc. It is obvious that by regulating the speed of the shafts, the feedin and distribution of the fuel may be contro led.

What I claim, is'

1. In an automatic stoker, the combination with a combustion chamber, of means for feeding fuel to the combustion chamber fthe eccentric 45 is moved upward, permitting y12o also takes care of the independent motion comprising a hopper, a fixed conveying member arranged above the hopper, a movable part having connection with said confuel through the fixed member, means for conducting fuel to said member having movable connection therewith, and means for conveying fuel to said conductin means.

3. In an automatic stoker, t 1e combination with a combustion chamber, of a regulated fuel introducing means therefor comprising a fixed fuel receiver carried by said combustion chamber, an intermittently op.- erated valve arranged therein, a conveyer, and a' two part extensible section arranged between said conveyer and said fixed receiver, one of said parts having a universally movable connection with said receiver, substantially as described.

4. In an automatic Stoker, the combination with a combustion chamber of a regulating fuel introducing means therefor comprising afixed fuel'receiver carried by said combustion chamber having a regulating valve therein, a conveyer, and a two part telescopingly extensible section arranged between said conveyor and said fuel receiver,

having movable connection with said conveyer and said receiver, substantially as described.

5. In an automatic Stoker, the combination with a combustion chamber, means for feeding fuel to said chamber comprising a stationary receiver and a fixed conveylng member above said receiver having a regulatmg valve therein, and means for conveymg fuel to said feedmg means havlng unlversal connection therewith, substantially` as described.

In testimony whereof I aflix my signature in presence of two witnesses.

MORRIS B. BREWSTER.

Witnesses M. B. SCHLEY,

ADDISON MCNEAL. 

